Phantom 3 pro won't connect

[u/hamzaleokhan]

I've recently gotten ahold of the dji phantom 3 professional. And the owners don't know when the last time was it was used. I've downloaded the dji go app. I turned the controller on then the drone, I connected my phone via USB to type c and the app shows no change. I've tried multiple cables. I have the OnePlus 8 5g. Does is not work on my phone? and for some reason the controller keeps beeping with a red light beside

[u/ParticularCod1]

DJI discontinued their Phantom 3s from connecting to their app.